. Agreed, but how? Poison? Gang of thugs like the ones that Daryl is hanging with now. Or just over run when a hoard of walkers come by. Or my favorite would be that Mary is Mary Yar. The great great great great great grandmother of Tasha Yar.

I think it could be a multitude of things. In terms of demand the biggest commodities would be: Sex, food, sport, entertainment, protection, and maybe reproduction.

Based upon the qualities of each in the group I'm assuming they could be used for different things. Maybe Glenn for sporting/entertainment for death pit of zombies, Maggie for sex/repro, Tyrese for protection, the baby for food (think veal), the list goes on and on.

The other route is scientific experimentation with zombies to create a cure/hybrid route. Think Woodbury miles beyond combined with Res Evil.

I would be interested for a third unique approach yet to be determined.